Transcript AIM: OBJ: DN: HW - Hicksville Public Schools / Homepage

OBJ: Given video, notes, activity sheet SWBAT describe
three types of muscle tissue and explain why muscles
work in pairs with 70% accuracy.
BRING IN TEXTBOOK
DN: HW check- Skeletal System Booklet;
Video: Muscular System
ACT: Introduction to Muscular System
Text, Read 24-28, Work on Muscular System Booklet
HW: Complete Muscular System Booklet; Work on
SMSD Review Sheets; SMSD Exam, Feb 25; Winter
Break: NYSSAE 2008 Exam (on scantron, due Feb 23).
MUSCLE NOTES
Conscious = self awareness; “I think, therefore I am”
Unconscious = not aware
Involuntary Muscles: not under concious
control; example: heart beat, breathing,
digesting food
Voluntary Muscles: under concious control;
example: facial expressions, walking
Striated = muscle with lines
Nonstriated = muscles without lines
Skeleton
Heart
Organ
THREE TYPES OF MUSCLES
Skeletal Muscles: attached to and moves
bones of the skeleton
Striated muscle
Voluntary muscle
Quick, fast but tires quickly
Tendon: attached
muscle to bone
THREE TYPES OF MUSCLES
Cardiac Muscle: heart only
striated muscle
involuntary muscle
does not tire
Smooth Muscle: part of internal organs and
blood vessels.
not striated
involuntary muscle
moves slowly, tires more slowly
MUSCLES WORK IN PAIRS
• Muscles work in pairs because . . .
Muscle cells can only contract
(they can not extend or expand).
One muscle contracts, the other muscle
relaxes (see transparancy)
Muscles contract only!!!